I just ordered a whole new top from boatcoversdirect.com. the sell replacement covers too. I ordered mine yesterday and the shipped it the same day. It should arrive tomorrow. The prices for the whole bimini top didn't seem too bad. Not sure about the replacement covers.
Got the top in yesterday, The fabric is 'Sunbrella' 9.5 oz. canvas. All hardware is SS and It was a snap to put together and install. If I could figure out how to attach a picture I would. I don't think you'll be disappointed.